How our AP affects our HP and MP.

I was working on a how DEX and STR affects an Islander's HP and MP and an earlier theory was that dex adds more MP and takes away HP from high level Islanders and this seemed to be true for the most part a few months ago but a few minutes ago I just created two characters adding pure strength on one and pure dex on another, the results were that the pure strength islander had more HP and MP The images are below:

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